Today, my shoes were rubbing against my heel so much that one heel started to bleed. Not having any plasters, I stuffed some tissue down my shoe. When I walked off the train, a wad of blood-stained tissue fell out the back of my shoe. The guy behind me didn't think it came from my shoe. FML

You'd be surprised how badly the back of your heel can bleed... I've been caught on the back of the heel with a z-rail (those things you wheel close around on in retail) not hard, but was literally dripping blood through my sock until I could give it some first aid.